[libretro] Some MSX2SMS hacked roms moving left continously

[litaniast]

I only used libretro, not gc/wii version yet

https://youtu.be/vCWn-vjZWXk https://youtu.be/1dCqj26dfwA I ran two MSX2SMS hacked roms in Genesis Plus GX libretro core, but both moves left continously even I didn't push left version.

All the input ports are same. (Auto, MD 6button, MD 3button and MS 2button)

Works well in other emulators like Gearsystem.

[ekeeke]

I cannot reproduce this issue neither in my SDL port or in my Retroarch setup with the latest .dll from this repository so it is likely a Retroarch configuration issue on your side or some Retrorach specific feature that causes this. Try disabling run-ahead to see if this changes something as this feature somehow hacks the input processing and can cause issue in games if misconfigured.

[litaniast]

When I set core option "Master System FM (YM2413)" turn to auto(default), that error isn't occur, but when I set that option to "on", that error occur.

[ekeeke]

Are these hacks compatible with Master System FM unit ?

If not, you should not force this option ON and leave it to AUTO (OFF by default for most games) as the FM unit is mapped in the same I/O port range as the controllers so if those hacks access controllers from one of the shared addresses, it will read FM unit state mixed with controller state, which can lead to such issue.

[litaniast]

Oops. sorry. It's the issue of those hacks, not Genesis Plus GX. They need to DETACH FM unit in Mark III(also in the real console), and no way to play in Japanese Master System(that has FM). (for emulator: need to disable Master System FM to play them) I checked SMSPower forum too lately.